# HP arms vs Quickgrind

The clearest difference is device support: HP arms at 3 against Quickgrind's 1. HP arms also leads on iOS requirement (12.0 vs 18.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

HP arms ships an update every 6 months, Quickgrind every 5 months. The most recent releases landed on September 15, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | HP arms | Quickgrind |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 5 months** |
| Size | 45 MB | 147 MB |
| Requires iOS | **12.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Renishaw plc](https://appshunter.io/developer/943016056) | [Quickgrind Limited](https://appshunter.io/developer/1703636457) |

## What reviewers say

### HP arms

[App page](https://appshunter.io/ios/app/hp-arms/id1441014006)

**Features:** macOS Compatibility

**In-app purchases:** none


### Quickgrind

[App page](https://appshunter.io/ios/app/quickgrind/id6462920546)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is HP arms free?

HP arms is free to download, with no in-app purchases.

### Is Quickgrind free?

Quickgrind is free to download, with no in-app purchases.

### Do HP arms or Quickgrind have ads?

Neither HP arms nor Quickgrind shows ads.

### Which is updated more often, HP arms or Quickgrind?

HP arms ships an update every 6 months, and Quickgrind every 5 months. Most recently, HP arms was updated on September 15, 2026 and Quickgrind on September 7, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*